Study On The Seismic Acquisition Method Of The Lower Yangtze Basin

The lower Yangtze basin is the Mesozoic-Paleozoic marine sedimentary system,which is the large prospective area of oil and gas exploration,but the complicated surface conditions and complicated geological conditions restricted oil and gas exploration in this area.Talking Huangqiao and Jurong typical areas as examples,dissected by the quality factors,studied on the two key points about geometry and shooting parameters for finding the way to improve the quality of seismic data.First,analyzed the surface conditions and geological conditions,through qualitative and quantitative analysis of previous data found out the defects about previous seismic data,and analyzed on corresponding relation between the surface-geological conditions and defects,the corresponding relation is established between complicated surface-geological conditions and seismic data quality,and determined the degree of influence.Then,on the basis of analysis of observation data making the principles of geometry design.The geometry is mainly to solve the imaging problem brought by the difficulty of underground structure,so,in this article carried out geometry design method based on wave equation forward modeling,and the advantages and applicability of different wave equation are analyzed,The geometries have been designed in Huangqiao and Jurong area and the application effect verifying the rationality of the design method.At last,Based on the rock blasting mechanism,explosives with different detonation velocities and pattern holes have been researched in Huangqiao area.Through the study of this paper the suitable geometry and shooting parameters were established in research area and the imaging effect have been improved.